Automatic trasmission and rear axel

i have a v8 350 carburated vortec motor and a automatic trasmission th700r4 4 speed , i want to know which one rear axel i get more displacement when the car to go in high speed, because with the actual rear axel it feeling forced, the rear axel have a gear crown inside 42 grooves. and i want to know how to do to the lock up or overdrive works in automatic way.

Welcome to PF, Omar. Unfortunately, your wording is very difficult for me to understand. And despite having Spanish blood, I can't communicate in that language.
If I understand correctly, the response is that the steeper that axle ratio is, the faster you will accelerate. A shallow ratio will give slower acceleration, but a higher top end.
For example:
If your car (even with that itty-bitty baby motor ) can run 13 seconds and top out at 100 mph in a quarter mile and continue on to 120 mph in the long run with 3:23 gears, swapping down to a 4:56 axle might give you 11.5 at 110 mph in the quarter, but your top speed will be only that 110 mph.
Those are just 'for instance' figures, not something that I worked out mathematically. Still, that's the essence of how the axle ratio affects performance.
You should really have a conversation with Stingray about this.